Improved rook-dkill



@uiten @anni @fitta DANIEL S. EARLY, OF HUMMELSTOWN, PENNSYLVANIA. Laws 11am No. 65,064, atea May 28, 1867.

IMPROVED ROCK-DRILL.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, DANIEL S. EARLY, of I'Iummelstown, in the county of Dauphin, and State of Pennsylvania, have invented anew and useful improvement in Rock-Drills; and I do hereby declare the following to be a full and correct description of the same, sufficient to enable others skilled in the art to which my invention appertains to understand and use. the same, reference being had to the accompanying drawing, making part of' this specification, and which represents a perspective view of the device, illustrating my invention.

This invention consists in so constructing a drill-rod that it may be raised and then rotated, and drop by its own weight, being lguided in its motion so that it cuts uniformly at all times. The frame is so constructed that it can be inclined at any desired angle, and Vis mounted on a longitudinal frame, having journals resting' Aon wheels, whereby the drill and frame can be readily moved from place to place.

In the drawing, A represents the foundation or bed-frarne, consisting of two longitudinal bars B, one end of each of which is turned or formed into handles a. The opposite ends b are curved downward, and prevent theupsetting ofthe frame in transportation. The bars are pierced near their curved ends, through which project the journals c of the lower cross-bar C of the vertical frame D on which the'drill-rod and operating parts are mounted. These journals rest on wheels c, whereby the frame and drill can be readily moved from place to place. This frame consists of two uprights E, with a cross-bar, d, connecting their upper ends. At a point about the middle of the vertical frame D, I secure lugs or ears F, in which is mounted a shaft, e, provided at one end with a crank-handle, f, and, near its bearing on the opposite end, with tappets G. These tappets consist of two arms, continuous with each other in the same line, and have a portion of their sides,

extending to their ends, out away, leavinga shoulder. g. The upper faces of the narrow ends are also cut away, and turned or bent downward, as seen at h in the drawing. H is a cross-head, having its ends slotted, so that it may be adjusted, and is retained in position by means of set-screw or equivalent devices. A square slet, 1f, is made in the middle of the cross-head H, the use of which will be presently explained. I is the drillrod, having irmly secured to it, near the middle of the vertical frame, a collar, K, and just above it a square shoulder, L, which passes through the slot z' in the cross-head II.

The operation is as follows: On turning the shaft e, the tappets G will be rotated, and the shoulder-y come in contact with the collar K, which,.being raised thereby, will carry 4the drill-rod with it. The shoulder L will prevent the turning of the rod untilit clears the slot, when'the bent edge of the ta'ppets will come into contact with the collar K, and turning the same, rotate the drill-rod.l It will be perceived that the drill-rod does not turn until it has been raised sufficiently to clear the slot c', thus having no resistance in the bottom of the bored hole, and facilitating the upward movement of the drill-rod. Nor can it rotate more than one-quarter of a revolution, ns thel square shoulder L must fall back into the slot z' the-moment the tappet descends from the collar. The cross-head H, however, may he adjusted, by means of the slots in its ends and set-screws in the frame, so as to `vary the relative position of the slot z' to the shoulder L in such a way that one-half or threequarters of a revolution may be made by the drill-rod if desired. To both sides of the horizontal frame there are pivoted curved rods M, their upper ends passing through the uprights E oi` the vertical frame, and retained in position by the set-screws Z. The vertical frame can be set at any angle with the surface oi' the ground, tnrning on the wheels c, and held by the rods M and set-screws Z.

The apparatus can be easily moved from place to place, is simple in operation, and cheap in construction.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is-

1. The drill-rod, constructedfwith the fixed collar K and shoulder L, in combination with the tappets G and slotted cross-head H, substantially as described, for the purpose speciiied.

2. The tappcts G, with shoulders g and turned ends h, arranged with the slotted cross-head I-I, in combination with the drill-rod I, having fixed collar K and square shoulder L, substantially as described, for'the purposes specified.

DANIEL S. EARLY.

Witn csses:

JESSE B. HUMMEL, WM. B, SfroNnn. 

